Cleaning brush



FIG. 1 is a perspective view of a cleaning brush showing my design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The bristles are partially shown in some of the views for ease of illustration. 

The ornamental design for a cleaning brush, as shown and described. 